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Annotation of embedaddon/quagga/isisd/isis_dynhn.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * IS-IS Rout(e)ing protocol - isis_dynhn.c
        !             3:  *                             Dynamic hostname cache
        !             4:  * Copyright (C) 2001,2002   Sampo Saaristo
        !             5:  *                           Tampere University of Technology      
        !             6:  *                           Institute of Communications Engineering
        !             7:  *
        !             8:  * This program is free software; you can redistribute it and/or modify it 
        !             9:  * under the terms of the GNU General Public Licenseas published by the Free 
        !            10:  * Software Foundation; either version 2 of the License, or (at your option) 
        !            11:  * any later version.
        !            12:  *
        !            13:  * This program is distributed in the hope that it will be useful,but WITHOUT 
        !            14:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
        !            15:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for 
        !            16:  * more details.
        !            17:  *
        !            18:  * You should have received a copy of the GNU General Public License along 
        !            19:  * with this program; if not, write to the Free Software Foundation, Inc., 
        !            20:  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
        !            21:  */
        !            22: 
        !            23: #include <zebra.h>
        !            24: 
        !            25: #include "vty.h"
        !            26: #include "linklist.h"
        !            27: #include "memory.h"
        !            28: #include "log.h"
        !            29: #include "stream.h"
        !            30: #include "command.h"
        !            31: #include "if.h"
        !            32: #include "thread.h"
        !            33: 
        !            34: #include "isisd/dict.h"
        !            35: #include "isisd/isis_constants.h"
        !            36: #include "isisd/isis_common.h"
        !            37: #include "isisd/isis_flags.h"
        !            38: #include "isisd/isis_circuit.h"
        !            39: #include "isisd/isisd.h"
        !            40: #include "isisd/isis_dynhn.h"
        !            41: #include "isisd/isis_misc.h"
        !            42: #include "isisd/isis_constants.h"
        !            43: 
        !            44: extern struct isis *isis;
        !            45: extern struct thread_master *master;
        !            46: extern struct host host;
        !            47: 
        !            48: struct list *dyn_cache = NULL;
        !            49: static int dyn_cache_cleanup (struct thread *);
        !            50: 
        !            51: void
        !            52: dyn_cache_init (void)
        !            53: {
        !            54:   dyn_cache = list_new ();
        !            55:   THREAD_TIMER_ON (master, isis->t_dync_clean, dyn_cache_cleanup, NULL, 120);
        !            56:   return;
        !            57: }
        !            58: 
        !            59: static int
        !            60: dyn_cache_cleanup (struct thread *thread)
        !            61: {
        !            62:   struct listnode *node, *nnode;
        !            63:   struct isis_dynhn *dyn;
        !            64:   time_t now = time (NULL);
        !            65: 
        !            66:   isis->t_dync_clean = NULL;
        !            67: 
        !            68:   for (ALL_LIST_ELEMENTS (dyn_cache, node, nnode, dyn))
        !            69:     {
        !            70:       if ((now - dyn->refresh) < (MAX_AGE + 120))
        !            71:        continue;
        !            72: 
        !            73:       list_delete_node (dyn_cache, node);
        !            74:       XFREE (MTYPE_ISIS_DYNHN, dyn);
        !            75:     }
        !            76: 
        !            77:   THREAD_TIMER_ON (master, isis->t_dync_clean, dyn_cache_cleanup, NULL, 120);
        !            78:   return ISIS_OK;
        !            79: }
        !            80: 
        !            81: struct isis_dynhn *
        !            82: dynhn_find_by_id (u_char * id)
        !            83: {
        !            84:   struct listnode *node = NULL;
        !            85:   struct isis_dynhn *dyn = NULL;
        !            86: 
        !            87:   for (ALL_LIST_ELEMENTS_RO (dyn_cache, node, dyn))
        !            88:     if (memcmp (dyn->id, id, ISIS_SYS_ID_LEN) == 0)
        !            89:       return dyn;
        !            90: 
        !            91:   return NULL;
        !            92: }
        !            93: 
        !            94: void
        !            95: isis_dynhn_insert (u_char * id, struct hostname *hostname, int level)
        !            96: {
        !            97:   struct isis_dynhn *dyn;
        !            98: 
        !            99:   dyn = dynhn_find_by_id (id);
        !           100:   if (dyn)
        !           101:     {
        !           102:       memcpy (&dyn->name, hostname, hostname->namelen + 1);
        !           103:       memcpy (dyn->id, id, ISIS_SYS_ID_LEN);
        !           104:       dyn->refresh = time (NULL);
        !           105:       return;
        !           106:     }
        !           107:   dyn = XCALLOC (MTYPE_ISIS_DYNHN, sizeof (struct isis_dynhn));
        !           108:   if (!dyn)
        !           109:     {
        !           110:       zlog_warn ("isis_dynhn_insert(): out of memory!");
        !           111:       return;
        !           112:     }
        !           113: 
        !           114:   /* we also copy the length */
        !           115:   memcpy (&dyn->name, hostname, hostname->namelen + 1);
        !           116:   memcpy (dyn->id, id, ISIS_SYS_ID_LEN);
        !           117:   dyn->refresh = time (NULL);
        !           118:   dyn->level = level;
        !           119: 
        !           120:   listnode_add (dyn_cache, dyn);
        !           121: 
        !           122:   return;
        !           123: }
        !           124: 
        !           125: /*
        !           126:  * Level  System ID      Dynamic Hostname  (notag)
        !           127:  *  2     0000.0000.0001 foo-gw
        !           128:  *  2     0000.0000.0002 bar-gw
        !           129:  *      * 0000.0000.0004 this-gw
        !           130:  */
        !           131: void
        !           132: dynhn_print_all (struct vty *vty)
        !           133: {
        !           134:   struct listnode *node;
        !           135:   struct isis_dynhn *dyn;
        !           136: 
        !           137:   vty_out (vty, "Level  System ID      Dynamic Hostname%s", VTY_NEWLINE);
        !           138:   for (ALL_LIST_ELEMENTS_RO (dyn_cache, node, dyn))
        !           139:     {
        !           140:       vty_out (vty, "%-7d", dyn->level);
        !           141:       vty_out (vty, "%-15s%-15s%s", sysid_print (dyn->id), dyn->name.name,
        !           142:               VTY_NEWLINE);
        !           143:     }
        !           144: 
        !           145:   vty_out (vty, "     * %s %s%s", sysid_print (isis->sysid), unix_hostname (),
        !           146:           VTY_NEWLINE);
        !           147:   return;
        !           148: }